New MVA taggers backport from 71X to 70X

[pvmulder]

Contains backport of the following 71X merged pull requests:
#2622
#3384
#3664
#3733

But also the unmerged 70X pull request to avoid clashes with backported code:
#3394

[cmsbuild]

A new Pull Request was created by @pvmulder (Petra Van Mulders) for CMSSW_7_0_X.

New MVA taggers backport from 71X to 70X

It involves the following packages:

DataFormats/BTauReco
PhysicsTools/MVAComputer
PhysicsTools/PatAlgos
RecoBTag/SecondaryVertex
RecoVertex/AdaptiveVertexFinder

@nclopezo, @monttj, @cmsbuild, @anton-a, @thspeer, @slava77, @vadler, @Degano can you please review it and eventually sign? Thanks.
@TaiSakuma, @GiacomoSguazzoni, @rovere, @nhanvtran, @ferencek, @cerati this is something you requested to watch as well.
You can sign-off by replying to this message having '+1' in the first line of your reply.
You can reject by replying to this message having '-1' in the first line of your reply.
@nclopezo, @ktf you are the release manager for this.
You can merge this pull request by typing 'merge' in the first line of your comment.

[ferencek]

@pvmulder #3394 is fully signed and should be merged very soon. It is therefore better to take it out of this PR (the first 8 commits are already included in #3394 but with different commit IDs and I don't really know how Git handles such cases). So if #3394 is not needed, I would take it out (we can always backport #3733 as a separate PR).

[vadler]

#3394 has just been merged. You can rebase onto the coming IB.

[cmsbuild]

+1
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-3774/147/summary.html

[cmsbuild]

Pull request #3774 was updated. @vadler, @slava77, @StoyanStoynev, @monttj can you please check and sign again.

[cmsbuild]

Comparison is ready
https://cmssdt.cern.ch/SDT/jenkins-artifacts/pull-request-integration/PR-3774/190/summary.html

[monttj]

+1
no difference in AT, already signed by Volker

[slava77]

+1

for #3774 7172aef
tested in CMSSW_7_0_X_2014-06-13-1400 (test area sign706b)
no changes as expected from the code changes.

@cmsbuild @nclopezo this is to stay in 70X (no forward porting, we are dealing with a case with a feature implemented differently in the old release).

[cmsbuild]

This pull request is fully signed and it will be integrated in one of the next CMSSW_7_0_X IBs unless changes (tests are also fine). @nclopezo, @ktf can you please take care of it?